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    Wyświetlanie 1-4 z 4
    Tytuł:
    The Consequences and Recurrence of Dangerous Occurrences in Air Transport in 1919-2018
    Autorzy:
    Kozuba, Jarosław
    Sirko, Stanisław
    Pila, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/2010317.pdf
    Data publikacji:
    2021
    Wydawca:
    Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
    Tematy:
    aviation accidents
    air transport
    recurrence occurrences
    safety
    statistics
    wypadki lotnicze
    transport lotniczy
    powtarzalność zdarzeń
    bezpieczeństwo
    statystyka
    Opis:
    The paper presents statistical research results regarding the occurrence of which dangerous aviation events in 1919-2018. The source of the information about the events was the AviationSafetyNetwork website. With the use of Excel 2016 and Statistica v. 12 computer programs, five-time intervals were identified in which hazardous aviation incidents took place.Characterizing the distribution of these events in all periods, due to the technological advancement and capabilities of airplanes, the distribution of dangerous events in the last three periods was compared. The following tests were used to verify the statistical hypotheses: , Shapiro-Wilk, Brown-Forsythe, Kruskal-Wallis. When choosing the appropriate test, the following factors were taken into account: the type of measurement scale, the dependence/independence of samples, and their number. The standard significance level was assumed to be α = 0.05. The consequences and repeatability of aviation events in the identified time intervals were analyzed. The research questions that were posed were the following: in which seasons of the year, months, days of the month, and days of the week did the most dangerous events deaths occur? How often did dangerous events take place? Was the distribution of events similar in the identified periods? The results of the conducted research allowed to identify five periods in which hazardous events took place and demonstrate that in particular periods the distribution of hazardous air events in subsequent seasons, months, and days of the week was not the same.
    Źródło:
    Safety & Defense; 2021, 3; 42-55
    2450-551X
    Pojawia się w:
    Safety & Defense
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Turbofan Engines Efficiency, Historical Trends, and Future Prediction: A Review
    Autorzy:
    Kuropatwa, Michał
    Wegrzyn, Nicolas
    Kozuba, Jarosław
    Powiązania:
    https://bibliotekanauki.pl/articles/2174776.pdf
    Data publikacji:
    2022
    Wydawca:
    Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
    Tematy:
    turbofan engine
    bypass ratio
    overall pressure ratio
    specific fuel consumption
    safety
    composite materials
    silnik turbowentylatorowy
    współczynnik obejścia
    całkowity stosunek ciśnień
    jednostkowe zużycie paliwa
    bezpieczeństwo
    materiały kompozytowe
    Opis:
    Technological development in the aviation business is usually dictated by diverse safety, economic, environmental, and social goals set by governments, regulatory agencies, and the market. Recently, a rapidly increasing interest in making air transportation climate neutral has been observed. The objective of this study is to analyze the historical trends of aircraft engine fuel efficiency, identify parameters affecting engine efficiency and initiate a discussion about future technology development needed to meet the expectations. The commercial turbofan engines test data comparison is provided in this study, followed by a theoretical assessment. The presented test data trends show a clear correlation between specific fuel consumption decrease and engine parameters like bypass ratio and overall pressure ratio increase, which is confirmed by theoretical assessment. Based on performed analysis results, a bypass ratio increase was indicated as the one potential path to reduce aircraft engine fuel consumption. Bypass ratio improvement could be achieved by fan diameter increase and rotation speed reduction in the case of turbofan engine architecture. A larger fan rotor requires a high torque drive and significantly increases engine weight which could be compensated by the lightweight design of the engine components, e.g., by applying composite materials.
    Źródło:
    Safety & Defense; 2022, 2; 82--90
    2450-551X
    Pojawia się w:
    Safety & Defense
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Capacity and Effectiveness of Screening People and Baggage with the Use of New Technologies: Standard C2
    Autorzy:
    Uchroński, Piotr
    Kozuba, Jarosław
    Letun, Magdalena
    Brzeska, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/2174778.pdf
    Data publikacji:
    2022
    Wydawca:
    Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
    Tematy:
    airport
    baggage security
    baggage control
    capacity
    effectiveness
    safety
    lotnisko
    ochrona bagażu
    kontrola bagażu
    przepustowość
    efektywność
    bezpieczeństwo
    Opis:
    One of the basic elements inseparably connected with air communication is the security control of persons and luggage which is performed by certified OKBs entered on the list of the President of the Polish CAA. An area of interest is the security check of hand baggage passengers take with them on board the aircraft. This control is carried out based on current legal regulations in the field of civil aviation security and is designed to detect prohibited and dangerous items hidden in the passenger's luggage specified in these legal acts. Due to the fact that the catalogue of these items is not included in an enumerative way, the security control operator assesses the possibility of using any item other than that specified in the document in terms of the possibility of making an act of unlawful interference. However, the skills of the security control operator are only one of the elements affecting the effectiveness of the security check being performed. The technical background and degree of technical sophistication are no less important in the control process. This paper aims to indicate possible organizational solutions to be applied in practice, which have a measurable impact not only on the effectiveness of the security control performed but also on the throughput at the security checkpoint, which in turn determines the operational readiness of the entire airport. The authors, through empirical studies carried out at airport security checkpoints equipped with different technical and technological solutions, quantitatively indicate the benefits of using new technologies and the possibility of choosing the organization of work at the security checkpoint, depending on the needs arising from the nature and number of flight operations.
    Źródło:
    Safety & Defense; 2022, 2; 72--81
    2450-551X
    Pojawia się w:
    Safety & Defense
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Evaluation of the Technical Condition of the ROTAX 912S Engine Based on Spectrographic Oil Analysis
    Autorzy:
    Kozuba, Jarosław
    Peruń, Grzegorz
    Stołtny, Bartosz
    Stołtny, Adam
    Wojnar, Tomasz
    Powiązania:
    https://bibliotekanauki.pl/articles/2174783.pdf
    Data publikacji:
    2022
    Wydawca:
    Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
    Tematy:
    aircraft operation
    maintenance
    oil analysis
    safety
    eksploatacja samolotów
    konserwacja
    analiza oleju
    bezpieczeństwo
    Opis:
    Flight safety, which characterizes the aviation industry, is an important element that contributes to increasing the trust of customers and passengers. The aforementioned factor closely corresponds to the reliability of aircraft and their individual components, including power units. Over one hundred years of development of aviation techniques has led aviation to the currently observed level of safety and reliability. Aviation techniques should be understood as technologies as well as local and global regulations affecting individual branches of the industry. Guidelines No. 9 of the President of Polish Civil Authority of August 29, 2016 on the inter-repair periods of piston engines, indicate the possibility of waiving the requirements related to the performance of major repairs, and a number of conditions must be met. One of the requirements set out in the Guidelines is performing a spectrographic analysis of engine oil in order to estimate the rate of wear of individual engine parts (ULC, 2016). The main goal of this study was to recognize whether regular analysis of engine oil may affect the assessment of the technical condition of aircraft piston engines based on the example of ROTAX 912S, thus affecting or not influencing the maintenance intervals. The engines referred to in the research were produced in the amount of about 2,000 units. Thus, these engines gained popularity as power units for airplanes, helicopters, and gyroplanes. With the increasing number of ROTAX units introduced into service, research into the technical condition becomes more important due to their percentage share in the market.
    Źródło:
    Safety & Defense; 2022, 2; 18--26
    2450-551X
    Pojawia się w:
    Safety & Defense
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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